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Perhaps the story could have originated only from a preppy New York City day school.

A highbrow Manhattan prep school is getting down and dirty to fight a former employee who claims he was fired for being straight.

The Trinity School on the Upper West Side called ousted coach Gregory Kenney a two-timing cad after he alleged in a lawsuit that he was fired by lesbian boss Pat Krieger in 2012 because he’s heterosexual.

But:

School officials insist that Kenney wasn’t ostracized for his traditional lifestyle. But they don’t let things lie there.

In court papers filed last month in response to the teacher’s Manhattan civil suit, they say Kenney’s colleagues “overheard him lying to his wife about staying late for work events, only to attend bars with other women who were not his wife.”